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4.2.5 State transitions

A standard set of state transitions is defined for the Machine. These transitions define the valid changes to the Program’s current state in terms of an initial state and a resultant state. The transitions are formally defined in Table 3.

Table 3 – Program state transitions

Transition no.

Transition name

Initial state

Resultant state

1

HaltedToReady

Halted

Ready

2

ReadyToRunning

Ready

Running

3

RunningToHalted

Running

Halted

4

RunningToReady

Running

Ready

5

RunningToSuspended

Running

Suspended

6

SuspendedToRunning

Suspended

Running

7

SuspendedToHalted

Suspended

Halted

8

SuspendedToReady

Suspended

Ready

9

ReadyToHalted

Ready

Halted

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